body {
  font-family: "IRANSans", sans-serif;
  background-color: #f8f8f8;
  color: #333;
  margin: 0;
  padding: 0;
  text-align: center;
  direction: rtl;
}

.notfound-container {
  max-width: 600px;
  margin: 100px auto;
  background: #fff;
  padding: 40px 20px;
  border-radius: 16px;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.05);
}

.notfound-container h1 {
  font-size: 110px;
  margin: 0;
  color: #d32f2f;
  font-weight: 900;
}

.notfound-container h2 {
  font-size: 26px;
  margin-top: 10px;
  color: #444;
}

.notfound-container p {
  margin: 15px 0 30px;
  color: #666;
  line-height: 1.8;
}

.back-btn {
  display: inline-block;
  background-color: #d32f2f;
  color: #fff;
  text-decoration: none;
  padding: 12px 30px;
  border-radius: 8px;
  font-weight: bold;
  transition: 0.3s;
}

.back-btn:hover {
  background-color: #b71c1c;
}